Its really not worth it in any way. Even rims might be a stretch. You'll spend so much money and never get it back. I went all out on my car, a 96 maxima. (about 8 years ago) I did literally everything I could possibly do to it and I wasted a lot of time and $$ on an import that was worth less then 4k when I decided to sell it.
If you were driving a mustang or something that held value, was fast to begin with and had a huge following then I'd say go for it but you'd be better off just enjoying it the way it is and putting the money towards a nicer car in the future.